Sinus arrhythmia is a variation in the heart's sinus rhythm, usually caused by changes in a person's breathing cycle. It's a common finding, especially in children and young adults, and its ...

Sinus rhythm (a.k.a. normal sinus rhythm) refers to the normal heart beat originating from the sinoatrial node. This is manifested as an upright P wave in lead II of the ECG. Sinus bradycardia ...

In the heart, β-adrenergic receptors are primarily responsible for responding to SNS signals. With a sustained block of the SNS, the researchers observed loss of the day-night rhythm in sinus node ...

Nonetheless, if a person suspects anomalies in the rhythm of their heart rate, they should contact a doctor for a diagnosis. In sinus tachycardia, the heart rate increases but continues to beat ...

Nodal rhythm - When there is a block in conduction of impulses AV node takes over as the pacemaker. This abnormal heart rhythm is called junctional rhythm or nodal rhythm. The heart rate in such ...

restoration of sinus rhythm occurs spontaneously. By definition, paroxysmal AF lasts for less than 7 days (usually less than 24 hours) [Hurst’s The Heart, 14th edition; Chapter 83, 11a] and does ...

Amiodarone effectively maintains sinus rhythm in patients with atrial fibrillation ... except for patients with substantial left ventricular hypertrophy or heart failure. This treatment approach ...

Sinus rhythm resumes with increased heart rates during exercise. In an ectopic atrial rhythm, P waves are present but are a different morphology compared to the sinus P wave. Ectopic P waves are most ...